Problem with mouse events

[Craig Deady]

I have the following two sample code fragments. The first code fragment 
works fine, the second one causes a Segmentation fault. The only 
difference is that the second responds to a mouse down event on a 
wxTextCtrl object and the first is a clicked event on a button.
Any ideas why I am getting the Segmentation fault?
Linux 2.6 (Fedora Core 5) & wxWidgets 2.6.3

Thanks,
Craig

void MainPanel::OnStartrefClick( wxCommandEvent& event )
{
    printf("UserLevel = %s\n",vUserLevel->GetValue().c_str());
   
event.Skip();
}


void MainPanel::UserSelect(wxMouseEvent& event)
{
    printf("UserLevel = %s\n",vUserLevel->GetValue().c_str());

    event.Skip();
}

-- 
Craig Deady